Can't say I see the effect you describe, but then I don't normally see the sidebars on your site.
That's because it only works on screens that are massively wider than the window size I normally use. Even with a maximised window I need to use the horizontal scrollbar to view the edges.
Just a thought... It would be worth considering significantly reducing the width of your central column if you want most people to easily access the sidebars. OTOH, if they are just full of adverts that have no consequence to visitors of you site, then keep it as it is!
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.